Yes, but it's mostly diet, and most people hate being accountable to themselves about what they eat. To get super shredded (steroid-free), the absolute
best combination I've found is calisthenics & a low-fat vegan diet. No gym required for bodyweight exercises & it's easy to control your calories & fat intake if you're prepping all of your food from veggies, fruits, nuts, etc. (provided you're not using packaged stuff that has fillers & preservatives in it) Frank Medrano is the perfect example for that:
http://www.cutandjacked.com/CutAndJacked-Interview-Calisthenics-Vegan-Frank-Medrano
Or even a fruitarian diet, also naturally low in fat:
https://www.youtube.com/watch?v=4TwXHsSE5Vg
But that's pretty extreme. Most people don't want to change their diets that much. IIFYM is the second-best way I've seen of getting shredded because you are accountable for both your calories & your macros, so you can explicitly control your results, and you still get to eat yummy stuff. That, and most people prefer doing weights for strength training because you can go to a gym, workout with your buddies, etc. And really, if you want to get big, you need stuff like weights. Bodyweight workouts get you shredded but not huge. But it's hard to maintain mass
and get shredded. A pretty good website to check out to learn more about what natural bodybuilding looks like is Natty or Not:
http://nattyornot.com/archives/
Good starter article:
How big can you get naturally, without steroids?
It all depends on what you're willing to do. If you eat right so you get your bodyfat percentage down & do workouts to make your muscles, especially your abs, pop out, then it's doable. It's also realizing that it's partly stagecraft. Bodybuilders will dehydrate themselves before shoots, eat cookies & workout to get a pump before the cameras roll, use lighting tricks like extremely lighting, spray-tans, and getting oiled up to highlight their muscles so that the definition becomes more visible to the eye.
Again though, aside from pumping up your muscles bigger, looking shredded pretty much boils down to having a low bodyfat percentage. Check out Helmut Strebl, who typically lives under 5%:
http://www.simplyshredded.com/shred...mut-strebl-talks-with-simplyshredded-com.html